Aim. To assess the effectiveness of preventive measures in endoscopic interventions on the major duodenal papilla.Methods. 1028 transpapillary interventions related to benign and malignant diseases were performed on 575 patients from 2007 to 2015. The analysis of complications rate and structure in different time intervals, taking into account the changing of patients management tactics and the use of different preventive technologies, was performed.Results. During 2007-2015, 30 cases of post-manipulational complications were registered (2.9% of patients) with a mortality rate of 0.09%. In the period from 2007 to 2008 post-manipulational complications rate was 8.5%. The main causes of complications were surgery long duration (up to 2 hours) and the lack of endoscopist experience. During this period, there was only one death, which was caused by acute cardiovascular insufficiency. From 2009 to 2011, the complications number decreased to 3.4% due to the careful patients selection for elective surgery, including the endosonography in diagnostic algorithm, octreotide, and hyoscine butylbromide use, the expansion of indications for the bile ducts stenting, exclusion the main pancreatic duct contrast, nasobiliary drainage in obstructive jaundice and suppurative cholangitis. In the period from 2012 to 2015, in the presence of a high risk of post-manipulational pancreatitis, every fifth intervention was completed by the main pancreatic duct stent placement with reducing of manipulations duration to 25-35 minutes, and increasing the surgery phases number. During this period, post-manipulational complications rate was 1.2%.Conclusion. Analysis of post-manipulational complications allowed to identify the most important measures to enhance the transpapillary interventions safety, thereby reducing the number of complications from 8.5% in the period of 2007-2008, to 1.2% in the period of 2014-2015.

Aim. To analyze the results of one and two-step endoscopic submucosal dissection in the treatment of colorectal neoplasms. Methods. Between 2018 and 2019, 17 patients (6 men and 11 women) aged 33 to 79 years underwent 21 endoscopic submucosal dissections of colorectal neoplasms ranging in size from 1.0 to 6.0 cm. Submucosal fibrosis was identified in 2 (11.8%) patients, epithelial neoplasms in 15 (88.2%) patients including laterally spreading tumors in 9 (60%), and large sessile colorectal polyps in 6 (40%) patients. Histological examination revealed a carcinoid tumor (11.8%), adenoma with low-grade (64.7%) and high-grade (23.5%) intraepithelial neoplasia. 13 patients were subjected to the one-step operation, and 4 patients required the two-step operation with a 1-day interval. Follow-up examinations after the operation were performed, on average, between 2 and 6 months. Results. En bloc endoscopic submucosal dissection was performed in 11 (64.7%) patients, 4 of them in combination with mucosal resection. Endoscopic piecemeal resection of the neoplasia was performed in 6 (35.3%) patients. The average operative time was 15573 minutes (range 40320 min). Intraoperative complications, which were eliminated endoscopically, occurred during 8 (38.1%) of 21 operations: intensive bleeding in 6 (75%) patients, diastasis of muscle fibers in 1 (12.5%) patient, perforation of the intestinal wall in 1 (12.5%) patient. At the follow-up at 6 months, all patients formed the scar at the surgical area, while 3 patients required endoscopic removal of residual adenoma 2 months after the operation. Conclusion. Endoscopic submucosal dissection is an effective method for removing colorectal neoplasms, while two-step dissection is a promising approach to the development of the technique.Keywords: one and two-step dissection, endoscopic submucosal dissection (ESD), colorectal neoplasms.

Aim. To approbate method of endoscopic removal of esophagus and stomach polyps using a ligation device.Methods. During the period from 2013 to 2015, 37 endoscopic polyps removal using the variceal band ligation device «G-Flex» (Belgium) were performed to 34 patients (26 women and 8 men) aged 17 to 68 years. Removed polyps size ranged from 5 to 11 mm. Polyps localization was as follows: esophagus abdominal part and stomach cardia - 7 (19%), stomach subcardial part - 2 (5%), stomach body - 19 (52%), antrum - 9 (24%). Before polyps removal, lesions biopsy and gastric juice acidity determination were performed to all patients, in 45% of cases endosonography was performed. According to the histological study results, hyperplastic polyps were detected in 5 (15%) patients, adenomatous polyps - in 29 (85%). In 2 patients the endosonography results revealed submucosal lesion, coming from the mucous membrane muscular layer.Results. Technical possibilities of the esophagus and stomach polyps endoscopic removal using variceal band ligation device, depending on the lesion location and size, were evaluated. In all cases, regardless of the focus localization and the comorbidity severity, a successful technical surgery performance was achieved in the absence of complications and symptoms recurrence in the early and late postoperative periods. Method advantages and disadvantages, indications for its performance in the inpatient and outpatient settings are revealed.Conclusion. In certain indications and performance technique adherence, the esophagus and stomach polyps endoscopic removal using variceal band ligation device is a safe and radical method of upper gastrointestinal tract benign epithelial lesions treatment.